using System;
using System.IO;
using System.Text;

namespace Server
{
    public struct LandData
    {
        private string m_Name;
        private TileFlag m_Flags;

        public LandData(string name, TileFlag flags)
        {
            this.m_Name = name;
            this.m_Flags = flags;
        }

        public string Name
        {
            get
            {
                return this.m_Name;
            }
            set
            {
                this.m_Name = value;
            }
        }

        public TileFlag Flags
        {
            get
            {
                return this.m_Flags;
            }
            set
            {
                this.m_Flags = value;
            }
        }
    }

    public struct ItemData
    {
        private string m_Name;
        private TileFlag m_Flags;
        private byte m_Weight;
        private byte m_Quality;
        private byte m_Quantity;
        private byte m_Value;
        private byte m_Height;

        public ItemData(string name, TileFlag flags, int weight, int quality, int quantity, int value, int height)
        {
            this.m_Name = name;
            this.m_Flags = flags;
            this.m_Weight = (byte)weight;
            this.m_Quality = (byte)quality;
            this.m_Quantity = (byte)quantity;
            this.m_Value = (byte)value;
            this.m_Height = (byte)height;
        }

        public string Name
        {
            get
            {
                return this.m_Name;
            }
            set
            {
                this.m_Name = value;
            }
        }

        public TileFlag Flags
        {
            get
            {
                return this.m_Flags;
            }
            set
            {
                this.m_Flags = value;
            }
        }

        public bool Bridge
        {
            get
            {
                return (this.m_Flags & TileFlag.Bridge) != 0;
            }
            set
            {
                if (value)
                    this.m_Flags |= TileFlag.Bridge;
                else
                    this.m_Flags &= ~TileFlag.Bridge;
            }
        }

        public bool Impassable
        {
            get
            {
                return (this.m_Flags & TileFlag.Impassable) != 0;
            }
            set
            {
                if (value)
                    this.m_Flags |= TileFlag.Impassable;
                else
                    this.m_Flags &= ~TileFlag.Impassable;
            }
        }

        public bool Surface
        {
            get
            {
                return (this.m_Flags & TileFlag.Surface) != 0;
            }
            set
            {
                if (value)
                    this.m_Flags |= TileFlag.Surface;
                else
                    this.m_Flags &= ~TileFlag.Surface;
            }
        }

        public int Weight
        {
            get
            {
                return this.m_Weight;
            }
            set
            {
                this.m_Weight = (byte)value;
            }
        }

        public int Quality
        {
            get
            {
                return this.m_Quality;
            }
            set
            {
                this.m_Quality = (byte)value;
            }
        }

        public int Quantity
        {
            get
            {
                return this.m_Quantity;
            }
            set
            {
                this.m_Quantity = (byte)value;
            }
        }

        public int Value
        {
            get
            {
                return this.m_Value;
            }
            set
            {
                this.m_Value = (byte)value;
            }
        }

        public int Height
        {
            get
            {
                return this.m_Height;
            }
            set
            {
                this.m_Height = (byte)value;
            }
        }

        public int CalcHeight
        {
            get
            {
                if ((this.m_Flags & TileFlag.Bridge) != 0)
                    return this.m_Height / 2;
                else
                    return this.m_Height;
            }
        }
    }

    [Flags]
    public enum TileFlag : long
    {
        None = 0x00000000,
        Background = 0x00000001,
        Weapon = 0x00000002,
        Transparent = 0x00000004,
        Translucent = 0x00000008,
        Wall = 0x00000010,
        Damaging = 0x00000020,
        Impassable = 0x00000040,
        Wet = 0x00000080,
        Unknown1 = 0x00000100,
        Surface = 0x00000200,
        Bridge = 0x00000400,
        Generic = 0x00000800,
        Window = 0x00001000,
        NoShoot = 0x00002000,
        ArticleA = 0x00004000,
        ArticleAn = 0x00008000,
        Internal = 0x00010000,
        Foliage = 0x00020000,
        PartialHue = 0x00040000,
        Unknown2 = 0x00080000,
        Map = 0x00100000,
        Container = 0x00200000,
        Wearable = 0x00400000,
        LightSource = 0x00800000,
        Animation = 0x01000000,
        NoDiagonal = 0x02000000,
        Unknown3 = 0x04000000,
        Armor = 0x08000000,
        Roof = 0x10000000,
        Door = 0x20000000,
        StairBack = 0x40000000,
        StairRight = 0x80000000
    }

    public static class TileData
    {
        private static LandData[] m_LandData;
        private static ItemData[] m_ItemData;

        public static LandData[] LandTable
        {
            get
            {
                return m_LandData;
            }
        }

        public static ItemData[] ItemTable
        {
            get
            {
                return m_ItemData;
            }
        }

        private static int m_MaxLandValue;
        private static int m_MaxItemValue;

        public static int MaxLandValue
        {
            get
            {
                return m_MaxLandValue;
            }
        }

        public static int MaxItemValue
        {
            get
            {
                return m_MaxItemValue;
            }
        }

        private static readonly byte[] m_StringBuffer = new byte[20];

        private static string ReadNameString(BinaryReader bin)
        {
            bin.Read(m_StringBuffer, 0, 20);

            int count;

            for (count = 0; count < 20 && m_StringBuffer[count] != 0; ++count)
            {
            }

            return Encoding.ASCII.GetString(m_StringBuffer, 0, count);
        }

        static TileData()
        {
            string filePath = Core.FindDataFile("tiledata.mul");

            if (File.Exists(filePath))
            {
                using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
                {
                    BinaryReader bin = new BinaryReader(fs);

                    if (fs.Length == 3188736)
                    { // 7.0.9.0
                        m_LandData = new LandData[0x4000];

                        for (int i = 0; i < 0x4000; ++i)
                        {
                            if (i == 1 || (i > 0 && (i & 0x1F) == 0))
                            {
                                bin.ReadInt32(); // header
                            }

                            TileFlag flags = (TileFlag)bin.ReadInt64();
                            bin.ReadInt16(); // skip 2 bytes -- textureID

                            m_LandData[i] = new LandData(ReadNameString(bin), flags);
                        }

                        m_ItemData = new ItemData[0x10000];

                        for (int i = 0; i < 0x10000; ++i)
                        {
                            if ((i & 0x1F) == 0)
                            {
                                bin.ReadInt32(); // header
                            }

                            TileFlag flags = (TileFlag)bin.ReadInt64();
                            int weight = bin.ReadByte();
                            int quality = bin.ReadByte();
                            bin.ReadInt16();
                            bin.ReadByte();
                            int quantity = bin.ReadByte();
                            bin.ReadInt32();
                            bin.ReadByte();
                            int value = bin.ReadByte();
                            int height = bin.ReadByte();

                            m_ItemData[i] = new ItemData(ReadNameString(bin), flags, weight, quality, quantity, value, height);
                        }
                    }
                    else
                    {
                        m_LandData = new LandData[0x4000];

                        for (int i = 0; i < 0x4000; ++i)
                        {
                            if ((i & 0x1F) == 0)
                            {
                                bin.ReadInt32(); // header
                            }

                            TileFlag flags = (TileFlag)bin.ReadInt32();
                            bin.ReadInt16(); // skip 2 bytes -- textureID

                            m_LandData[i] = new LandData(ReadNameString(bin), flags);
                        }

                        if (fs.Length == 1644544)
                        { // 7.0.0.0
                            m_ItemData = new ItemData[0x8000];

                            for (int i = 0; i < 0x8000; ++i)
                            {
                                if ((i & 0x1F) == 0)
                                {
                                    bin.ReadInt32(); // header
                                }

                                TileFlag flags = (TileFlag)bin.ReadInt32();
                                int weight = bin.ReadByte();
                                int quality = bin.ReadByte();
                                bin.ReadInt16();
                                bin.ReadByte();
                                int quantity = bin.ReadByte();
                                bin.ReadInt32();
                                bin.ReadByte();
                                int value = bin.ReadByte();
                                int height = bin.ReadByte();

                                m_ItemData[i] = new ItemData(ReadNameString(bin), flags, weight, quality, quantity, value, height);
                            }
                        }
                        else
                        {
                            m_ItemData = new ItemData[0x4000];

                            for (int i = 0; i < 0x4000; ++i)
                            {
                                if ((i & 0x1F) == 0)
                                {
                                    bin.ReadInt32(); // header
                                }

                                TileFlag flags = (TileFlag)bin.ReadInt32();
                                int weight = bin.ReadByte();
                                int quality = bin.ReadByte();
                                bin.ReadInt16();
                                bin.ReadByte();
                                int quantity = bin.ReadByte();
                                bin.ReadInt32();
                                bin.ReadByte();
                                int value = bin.ReadByte();
                                int height = bin.ReadByte();

                                m_ItemData[i] = new ItemData(ReadNameString(bin), flags, weight, quality, quantity, value, height);
                            }
                        }
                    }
                }

                m_MaxLandValue = m_LandData.Length - 1;
                m_MaxItemValue = m_ItemData.Length - 1;
            }
            else
            {
                Console.WriteLine("tiledata.mul was not found");
                Console.WriteLine("Make sure your Scripts/Misc/DataPath.cs is properly configured");
                Console.WriteLine("After pressing return an exception will be thrown and the server will terminate");

                throw new Exception(String.Format("TileData: {0} not found", filePath));
            }
        }
    }
}